Prepare all ingredients.

Steam the sweet potatoes until soft. Test with a chopstick; it should pierce through easily.

Separate egg whites and yolks carefully.

Whisk the egg whites into a meringue. Gradually add sugar while whisking.

Mash the steamed sweet potatoes, leaving small chunks for texture.

Mix the mashed sweet potatoes with a small amount of milk and the egg yolks.

Fold the meringue gently into the sweet potato mixture.

Transfer the mixture into a microwave-safe container. Leave some space for expansion.

Microwave for 6–15 minutes, depending on the consistency of the mixture.